Planooraph co



A. LIBERT. AUTOMATIC ROLL STR'IPPING MECHANISM.

APPUCATION HLED FEB. 11. 1918' 1 ,3 1 5,227 Patented Sept. 9, 1919.

. 4 SHEETS-SHEET l.

A- LIBERT.

AUTOMATIC ROLL STFHPPI'NG MECHANISM.

APPLICATION FILED FEB. ll. IQIB.

Patented Sept. 9, 11919.

- 4 SHEETS-SHEET 2- (Maega- THB COLUMBIA PLANOGRAPH 60., WASHINGTON, D. c.

A. LIBERT.

AUTOMATIC ROLL STRIPPING MECHANISM.

APPLICATION FILED FEB. 11. ms.

Patented Sept. 9,1919.

4 SHEETSSBEET 4.

noynkoz WNW woo @W 3% 5 Clttozncaalj' THE COLUMBIA PLANOGRAPH c0., WASHINGTOI. n. c.

i when the ARTHUR LI BERT, OF GREEN BAY, WISCONSIN.

Specification of Letters Patent.

AUTOMATIC RoLL-srmrrin'e MECHANISM.

Application filed February 11, 1918. Serial No. 216.579..

To all whom it may concern.

Be it known that I, ARTHUR LIBERT, a citizen of the United States, residing at Green Bay, county of Brown, and State of Wisconsin, Improvements in Automatic Roll-Stripping Mechanism, of which the following is a specification.

My invention relates to improvements in automatic roll stripping mechanisms, with partlcular reference to that type of devices in which pulp or pulpy material is accumulated upon a roll to' which it is conveyed by an endless belt or apron, the roll being arranged to bear upon the apron or upon the pulp carried thereby in such a manner as to progressively accumulate successive layers upon its periphery. t t In suchmachines, it is the usual practice to cut or. strip the material from the roll accumulated mass has reached a predetermined degree of thickness, and the object of my invention is to provide effective means for automatically slitting the material as nearly as possible along a straight line extending longitudinally of the periphery of the roll and then stripping the material from the knife and from the roll in such a manner as to preserve the continuity of the sheet and progressively utilize the weight of the separated portion to assist in overcoming the adhesion of the remaining portion to the roll, whereby the material may be withdrawn from the roller with minimum mutilation of the sheet, and whereby the surface of the roll may be left ontirely smooth and completely cleared of the accumulated mass.

My invention also has for its object to provide improved means for positively adjusting the cutting knife in cutting position and adequately supporting it in such position during the cutting operation; to provide means for eflectually preventing the material from catching or adhering to the points of a knife having a serrated edge; to provide means whereby motion transmit ting connections may yield in a manner to prevent excessive pressure or breakage of parts; and in general to provide a form of construction which will be entirely automatic in its action under any ordinary conditions, and so reliable in operation as to require but little attention.

In the drawings 2- Figure 1 is an end elevation of an ac have invented new and useful cumulator and stripping mechanism embodying my invention, with frame elements broken, away and with the shafts illus trated in cross section. y

.Fig. 2 isa detail View of the crank wheel and its associated connections, on an enlargedscaleythe crank wheel being shown With. the crank in a position which it occupies on completion of a slitting operation.

Patented Sept. 9, 1919; A

Fig. dis an end elevation, showing fragments of the accumulator roll, the table, and of the supporting frame, with the crank wheel in neutral position, and with the slitterblade and stripper blade illustrated in cross section iii-neutral position.

Fig. L is a detail plan view showing a fragment of the slitter blade. Fig. 5 is a View similar to Fig. 3, but showing the slitter blade in the positlonwhich t occupies during a slitting operat on, this blade and the stripper blade being also shown in cross section.

. Fig. 6 is a plan view of the machine, wlth the central portions partlally broken away.

Like parts are identified by the same reference characters throughout the several views. i i

The pulp carrying apron 1 runs over the rollers 2, 3 and f in the direction indicated by the arrow in Fig. 1. The accumulator roll 7 is mounted in vertically slidlng bea ring members 9 guided in suitable ways in the standards 11. At one end. the roller shaft 12 is extended and provided with a friction wheel .13, and when the bearmg members 9 are lifted, this wheel is brought into contact with the periphery of an eccentrically mounted crank wheel 15 whlch controls the action of the stripper knives as hereinafter explained.

The crank wheel shaft 17 is supported by one arm of a lever 19, fulcrumed to the frame at 20 and having another arm 21 1n spring cushion connection with the frame at 22, whereby the crank wheel may yield resiliently under the pressure of the fr ction wheel when the accumulator roll is lifted.

A cutter blade 25 is secured to a shaft 26 which extends along one side of the roll 7 and carries brackets 27 to which thisblade may be adjustably secured by suitable clamping bolts. The blade is adapted to swing upwardly until reaches a substantially horizontal position in contact with an angle iron stop rail28, or w th ad ustable actual contact, such as would cut or mar the roll 7. The

cut -or perforated only by the points of the stops, the pomts of the teeth 32 will-be in close proximity to, or in substantial contact with, the periphery'ief the roll. without the roll. When in' contact with said stop this blade preferably occupies a plane a little below the horizontal plane of the axis of material will ordinarily be teeth. These make perforations or slits in the pulpfand thereby establish a line of weakness,* 'whereby the pulp may be torn away from the roll between the teeth.

But th blade normally occupies an inclined r plane, with it's cutting edge depressed and{ at a substantial distance from the roll,- as shown in-Fig. 8. It may be automaticallyswung' upwardly against the stops byan arm 35, rigidly connected with the shaft 26, this arm being actuated from the crank wheel 15 through crank 37 and a connecting rod 38, the latterexcarried by tending through an aperturein a bearing member 39 which is pivoted-to the swinging end of arm 35, and through which the connecting rod 88 may slide. The sliding movement is resisted by cushion springs 41 and 4E2 the rod 38, whereby the arm 35 may be actuated by the connecting rod 38 under: yielding resilientpressure.

' Shaft 26 may also be manually oscillated by a hand lever 45. p A' stripper blade 47 is adapted to cooperate with the ;cutter blade 25. This stripper blade is secured to supporting levers 49 whichare fulcrumed to a shaft 50 parallel to shaft 26 and below the latter. The shaft 50' is also somewhat more distant from the vertical planeof the axis of roll 7. A short arm 52' ofv each lever 49 is connected with a projection 53 on bracket 27 by a spring 5i, whereby when shaft 26 is oscillated as above explained, its motion will be transmitted to the levers 49.

The arrangement is such that when'the cutter blade 25 swings upwardly to a horizontal position, the blade4l7 will also swing upwardly in the arc ofa circle described from the axis ofshaft 50, whereby thisblade 47 willhave its cutting margin brought into contact,. (or substantial contact) with the under surface 'of the; blade 25 immediately back of the teeth thereof, or at least back of the points of the'teeth. During the reverse orretractive movement, blade 47 will move along the teeth of blade 25 to the points thereon as shown by dottedlines in Fig. 3, and thence downwardly to the full linepositionof Fig. 3, in which blade 4.7 is quite widely separated from blade 25.

At one end of the machine, shaft 26 is provided with an arm 56, adapted, when the parts are in the position in which they are shown in Fig. 5, to substantially bear upon an arm 57 connected with shaft 50. The arm 57 has a smooth upper surface along which arm 56 moves in sliding contact when shaft 26 is oscillated to retract the blades from cutting position. This relieves the spring 54; from any heavy strain. The spring will tend to hold the arms 56 and 57 in contact, but will allow a limited upward movement of blade 25 independently of blade 47, the power being initially transmitted to blade 25 from the crank wheel.

In operation, it will be understood that the pulp conveyed by the apron 1 will be allowed to accumulate on the periphery of the roll 7, the latter being arranged to bear upon the apron directly above the roll 2 with any' desired pressure. Ordinarily the weight-of the roll 7 will be sufiicient. As the pulp accumulates upon the periphery of the roll 7, the latter will be lifted vertically, its bearings being guided by the frame as above explained. VVhen a layer of the desired thickness has been accumulated upon the roll 7, the friction wheel 13 will engage the periphery of crank wheel 15, whereupon the latter will commence to revolve from the neutral position in which it is illustrated in Fig. 3, and in the direction indicated by the arrow in said figure.

The motion of the crank 37 carried by this wheel will be transmitted to the slitter blade 25, as above explained, and will also be transmitted to the stripper blade *7, whereby both of these blades will be swung upwardly to the position in which they are illustrated in Fig, 5, the cutting teeth of the slitter blade being driven through the accumulated material on roll 7, thereby severing the material at intervals substantially along a, straight horizontal line of incision. The upward pressure of the material upon the cutting blade, will, of course, be resisted by the stop rail 28, and the blade will therefore be held rigidly in position, with its cutting edge in close proximity to the periphery of the roll. As the roll continues to revolve, the material adhering to its periphery will be forced to yield, and will be pushed away from the roll below the slitter blade 25. It will also be pushed away from the slitter blade by the stripper blade 47. The slitter blade will reach the slitting position before the crank wheel 15 has revolved a half turn, but the crank will be permitted to continue to move toward the position in which it is illustrated in Fig. 8, for the reason that the connecting rod 38 is permitted to slide through the coupling member39, the latter being in the form of telescoping sleeve members. Spring 41 will be compressedfrom the time that the slitter blade has reached the slitting position until the crank crosses the axis of the connecting rod 38, after which this spring 41 will be permitted to react, and spring 42 will then begin to press against the coupling member 39 from the opposite side, thereby exerting a resilient pressure upon arm Soto swing the slitter blade downwardly toward the neutral position in which it is illustrated in Fig. 3.

During the downwardly swinging move ment of the slitter blade 25, the stripper blade 4-7 advances along the under surface of the slitter blade to the position in which it is illustrated by dotted lines in Fig. 3, thereby pushing the material from the cutting edge of the ticularly important where the slitter blade is provided with serrations to facilitate the entry of the blade into the mass of pulp on the roll 7. After. the blades have reached the position indicated by dotted lines in Fig. 3, their continued downward movement about different axes will cause them to separate when swinging to the neutral position in which they are illustrated in full' lines in said figure. During the whole of their downward movement, or substantially the whole movement, they may push the severed material downwardly in the form of a sheet or strip, and will continue to do so until it drops upon an inclined table mem ber 60, also illustrated in Fig. 3.

Thereupon the continued revolution of the roll 7- will pushthe material down along this table member 60, and outwardly upon the main table 61. After the end of the strip has dropped to table 60 the weight of the material will be suflicient to progressively cleave the strip from the roll 7 until the roll has been entirely cleared. This will be accomplished during, asingle revolution of the roll 7 It will, of course, be understood that when the roll 7 has been cleared by removing, the accumulated material, as above described, it will move downwardly in its bearings until it again rests upon the surface of the apron 1. Owing to the eccentric mounting. of the crank wheel, its periphery will maintain resilient contact with the driving friction wheel until the crank wheel has rotated substantially a complete revolution from the position in which it is shown in Fig. 8.

If desired, theblades may be manually adjusted to cutting position by the lever 45. This is normally connected With the arm 35 by a coupling pin 59, (Fig. 6) but it is also keyed or cross pinned to the shaft 26, and by withdrawing the coupling .pin 59, the lever and shaft 26 may be independently actuated, since the arm 35 is otherwise loose on the shaft 26.

It will be observed that the friction wheel '13 is somewhat larger in diameter than the the edge of blade 25 is slitter blade. This is par slitter blade transversely axis substantially transmit motion to the crank wheel during.

a single revolution of the latter, and in the time required for the roll 7 to revolve from the point where the slitting operation takes place to a point where the rear end of the removedstrip or sheet of material passes from beneath the roll 7 and allows the latter to more downwardly into direct contact with the apron 1. i

i In this description the terms blade and slitterblade are herein used to distinguish the blade 25 from the stripper blade 47, but it will be understood that while preferably a sharp clearing pulp from fcutter edge, yet when used for accumulator rolls, only the teeth 32 will enter the material. It is impossible to slit wet plup along a straight line with a straight edgedlblade. Such material is difiicult to out under any circumstances, and it is impossible to cut it by means of aswinging knife, having a straight edge. In fact I have found it necessary to have the teeth quite narrow and at a substantial distance apart in ordertobe able to force them into the pulp, and establish a tearing line, or line of weakness,alongwhich the pulp may betorn apart. The cutting or slitting edge of blade 25 which does the work of cutting into the pulp is therefore to be understood as comprising the pointsof the teeth.

I claim: I

1. Stripping mechanism for accumulator rolls, including the combination with the roll, of a slitter blade having a cutting edge, means for moving the blade to bring its cutting edge into and out of proximity to the periphery of the roll, and a stripper adapted for relative movement along the edge of the of the blade during the initial retractive movementof the latter.

2. Stripping mechanism for accumulator rolls, including the combination with the roll, of a toothed slitter blade supported to oscillate about a longitudinally extending parallel to the roll, and having a cutting edge in substantial contact with the periphery of the roll when the blade is in one position, a stop adapted to hold the blade against continued movement with the roll beyond said position, and means for transmitting motion from the roll to oscillate the blade to said position when material of a predetermined thickness has acoun'u'ilated on the roll.

3. Stripping mechanism for accumulator rolls, including thecombinationwith the mu. of a toothed slitter blade supported to oscillate about a longitudinally extending axis substantially parallel tothe roll, and having a cutting edge in substantial contact with the periphery of the roll when the blade is in one position, a stop adapted to hold the blade against continued movement with the roll beyond said osition, and resiliently yielding motion from the roll to oscillate the blade to said position when material of a predetermined thickness has accumulated on thetroll.

4:. Stripping mechanism for accumulator rolls, including the combination with an accumulator roll provided with sliding bearings, of a friction wheel connected with the roll, a crank wheel resiliently supported in the path of the friction wheel, and adapted to be actuated thereby when the roll is lifted by accumulation of material upon its periphery, an oscillatory slitter blade having a cutting edge, and adapted when in one position to have such edge forced through the material into proximity to the periphery of the roll, resiliently yielding connections between the crank wheel and said oscillatory cutter blade adapted when the crank wheel is rotated to swing the cutter blade to cutting position.

5. Stripping mechanism for accumulator rolls, including the combination with an accumulator roll provided with sliding bearings, of a friction wheel connected with the roll, a crank wheel resiliently supported in the path of the friction wheel, and adapted to be actuated thereby when the roll is lifted by accumulation of material upon its periphery, an oscillatory slitter blade having a cutting edge, and adapted when in one position to have such edge forced through the material into proximity to the periphery of the roll, resiliently yielding connections between the crank wheel and'said oscillatory cutter blade, adapted, when the crank wheel is rotated, to swing the cutter blade to cutting position, said crank wheel, when released from contact with the friction wheel, being adapted to automatically rotate to normal position, with the blade retracted to an inoperative position.

'6. Stripping mechanism for accumulator rolls, including the combination with the roll, of a blade supporting shaft disposed parallel to the roll, an oscillatory slitter blade supported by the shaft, and adapted to be swung about the axis of the shaft to bring its working edge into and out of proximity to the periphery of the roll, and means controlled by the material accumulated on the periphery of the roll for actuating said blade into a position to cut through said material along a line substantially parallel with the axis of the roll, together with means for positively preventing the blade from swinging beyond the cutting position in the direction in which the opposing surface of the roll travels.

7. Stripping mechanism for accumulator rolls, including the combination with the roll, of a slitter blade mounted to oscillate means for transmitting at one side of the roll, and having a cutting edge adapted to swing into and out of cutting relation to material carried by the periphery of the roll, the cutting edge of said blade having a serrated contour.

8. Stripping mechanism for accumulator rolls, including the combination with the roll, of a plurality of blades supported to oscillate about different axes, each substantially parallel to the axis of the roll, one of the blades being adapted in one position of oscillatory adjustment to cut through the material accumulated on the periphery of the roll, and the other blade being adapted to bear upon the under surface of the first mentioned blade back of its cutting edge when the latter is in cutting position, both of said blades being adapted to swing downwardly with a separating movement from the cutting position to a normal inoperative position, and means controlled by material accumulated on the periphery of the roll for automatically swinging the blades from a normal inoperative position into said cutting position.

9. Stripping mechanism for accumulator rolls, including the combination with a roll having a supporting shaft mounted in vertically movable bearings, of a slitter supporting shaft substantially parallel to the axis of the roll, a slitter blade carried thereby and adapted to be oscillated into and out of cutting relation to material carried by the periphery of the roll, a clearing blade and support therefor, adapted to oscillate about an axis located at a greater distance from the axis of the roll than the slitter shaft, and arranged to support the clearing blade with one edge thereof bearing upon the under surface of the slitter blade during a slitting operation, a member adapted to be actuated by the roll when the latter has been lifted a predetermined distance, and resilient motion transmitting connections adapted to swing the blades to cutting position with reference to the material carried by the periphery of the roll when said member is actuated by the roll.

10. Stripping mechanism for accumulator rolls, including the combination of a con .veyer, a supporting roller over which the conveyer travels, a superposed accumulator roll adapted to collect material from the conveyer upon its periphery, a receiving table for material delivered from the accumulator roll, an oscillatory blade adapted to be swung into position to cut into the material carried by the roll at a point above said table, means controlled by the material on the periphery of the roll for actuating said blade into cutting position under rcsilient pressure, and means for holding said blade rigidly in cutting position during a cutting operation.

11. Stripping mechanism for accumulator team rolls, including the combination with a roll rotatably mounted upon 1 a movable axial support, a crank wheel adapted to beactu ated from the roll when the latter. and its blade, and a connectingrod a'ssociatedwith and havlng reslllent connection with SIlClOPGHllZ1Dg arm, whereby a rotathe crank,

tion of the crank wheel may swing the blade under resilient pressure into cutting POSI- tion.

12. Stripping mechanism for accumulator rolls, including the combination with a roll rotatably mounted upon a movable axial support, a crank wheel adapted to be actuated from the roll when the latter and its sup port are in one position, an oscillatory cutter blade supported at one side of the roll, and provided with a cutting edge adapted to be swung into and out of cutting relation to to material carried by the periphery of the roll, a crank on the crank wheel, an operating arm connected with the cutter blade, and a connecting rod associated with the crank, and having resilient connection with said operating arm, whereby a rotation of the crank wheel may swing the blade under resilient pressure into cutting position, together with an adjustable stopadapted to limit the movement of the blade when swung to cutting position, and to rigidly hold it in such position during a cutting operation.

13. Stripping mechanism for accumulator rolls, including the combination with a roll rotatably mounted upon a movable axial support, a crank wheel adapted to be actuated from the roll when the latter and its support are in one position, anoscillatory cutter blade supported at oneside of the roll, and provided with a cutting edge adapted to be swung into and out of cutting relation to material carried by the periphery of the roll, a crank on the crank wheel, an operating arm connected with the cutter blade, a connecting rod associated with the crank, and having resilient connection with said operating arm, whereby a rotation of the crank wheel may swing the blade under resilient pressure into cutting position, together with an adjustable stop adapted to limit the movement of the blade when swung to cutting position, and to rigidly hold it in such position during a cutting operation, and a clearing blade mounted to oscillate at a longer radius, and adapted to move along the under surface of the cutting blade beyond the cutting edge thereof when the blades are swung out of cutting position.

, 14. Stripping mechanism for accumulator rolls, including, the eombinauoa with i the roll, of a sli er bladefadapted tooscillate a'boutlari aiiis substantially parallel to that oruie roll, into amrbur r a (plane, radial to the center of the roll,\a" clearing blade similarly mounted upon a different 1 a different radial plane, and at a greater distance from the center of the roll, resili ene onaectmn between the mounting of the slitter blade andthe messenger the strippe b ade ad pt d. w t n i motien fromone to the otherfand means for oscillating one of the blades to swing the slitter blade into cutting relation to material accumulated on the surface of the roll, the arrangement being such that when in such position the clearing blade will have one margin in substantial contact with the under surface of the slitter blade in a posi tion to push forwardly to the cutting edge of the slitter blade when the latter is swung toward a normal retracted position from the cutting position.

15. Stripping mechanism for accumulator rolls, including the combination of a slitting blade, a stripper blade adapted for move ment along the under surface of the slitting blade, during downward movement of the latter, and means for actuating both of said blades into and out of operative position.

16. Stripping mechanism for accumulator rolls, including the combination of a slitting blade, a stripper blade adapted for movement along the under surface of the slitting blade, during downward movement of the latter, means for actuating both of said blades into and out of operative position, said actuating means including a device controlled, as to operation, by the quantity of material accumulated on the roll, and resilient connections between said device and the blades.

l7. Stripping mechanism for accumulator rolls, including the combination with the roll, of a slitter blade adapted to cut through accumulated material on the roll, along a line extending longitudinally of the roll, a clearing blade adapted to cooperate with the slitter blade in discharging the material from the roll after a cutting operation, mountings for the respective blades, and a resilient connection between the mountings. 18. Stripping mechanism for accumulator rolls, including thecombination with a roll, of an oscillatory longitudinally extending slitter blade, means for automatically actuating said blade into cutting position, means for rigidly holding the blade in cutting position during the cutting operation, said auto matic blade actuating means including a friction wheel connected with the roll, a crank wheel adapted to engage the friction wheel when theroll is lifted by accumulated material, and a connecting rod operatively eonnected Withthe crank Wheel, resiliently connected with said blade.

19. Stripping mechanism for accumulator rolls, including the combinationcwith the roll, of a slitter blade adapted to oscillate about an axis substantially parallel to that of 'the roll,'and adapted, in one position, to cut through the material carriedupon the roll, means for automatically actuating said.

10 slitterblade i to and.- out of cuttingr posi- Copies ofthis patent may be obtained for five cents each, by addressing the tion, and means for manually actuating the .In testimony whereof I affix my signature in the presence of two Witnesses.

ARTHUR LIBERT.

Witnesses O. C. WVEBER,

FREDERICK W. NOLTE.

Commissioner of Patents,

Washington, D. 0. 

